Air cooler



FIG. 1 is a top view of an air cooler showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right plan view thereof;

FIG. 4 is a front side elevational view thereof;

FIG. 5 is a left elevational view thereof;

FIG. 6 is a perspective side view thereof; and,

FIG. 7 is a bottom view thereof. 

CLAIM The ornamental design for an air cooler, as shown and described. 